Merge pull request #38 from tomaka/x11_fullscreen

X11 fullscreen

5 files changed, 164 insertions, 44 deletions

diff --git a/.travis.yml b/.travis.yml
index eab930b..f209793 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,8 @@
 language: rust
 
+install:
+  - sudo apt-get install libXxf86vm-dev
+
 os:
   - linux
   - osx
diff --git a/src/lib.rs b/src/lib.rs
index 8db5f40..af0706d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -7,9 +7,9 @@
 //!  platforms as possible.
 //!
 //! # Building a window
-//! 
+//!
 //! There are two ways to create a window:
-//! 
+//!
 //!  - Calling `Window::new()`.
 //!  - Calling `let builder = WindowBuilder::new()` then `builder.build()`.
 //!
@@ -104,7 +104,7 @@ impl WindowBuilder {
     }
 
     /// Builds the window.
-    /// 
+    ///
     /// Error should be very rare and only occur in case of permission denied, incompatible system,
     ///  out of memory, etc.
     pub fn build(mut self) -> Result<Window, String> {
@@ -129,16 +129,16 @@ impl WindowBuilder {
 ///
 /// ```ignore
 /// let window = Window::new().unwrap();
-/// 
+///
 /// unsafe { window.make_current() };
-/// 
+///
 /// loop {
 ///     for event in window.poll_events() {
 ///             // process events here
 ///             _ => ()
 ///         }
 ///     }
-///     
+///
 ///     // draw everything here
 ///
 ///     window.swap_buffers();
@@ -159,7 +159,7 @@ impl Window {
     /// Creates a new OpenGL context, and a Window for platforms where this is appropriate.
     ///
     /// This function is equivalent to `WindowBuilder::new().build()`.
-    /// 
+    ///
     /// Error should be very rare and only occur in case of permission denied, incompatible system,
     ///  out of memory, etc.
     #[inline]
@@ -249,7 +249,7 @@ impl Window {
     }
 
     /// Returns an iterator to all the events that are currently in the window's events queue.
-    /// 
+    ///
     /// Contrary to `wait_events`, this function never blocks.
     #[inline]
     pub fn poll_events(&self) -> PollEventsIterator {
@@ -258,7 +258,7 @@ impl Window {
 
     /// Waits for an event, then returns an iterator to all the events that are currently
     ///  in the window's events queue.
-    /// 
+    ///
     /// If there are no events in queue when you call the function,
     ///  this function will block until there is one.
     #[inline]
diff --git a/src/x11/ffi.rs b/src/x11/ffi.rs
index 2bd2075..fe91033 100644
--- a/src/x11/ffi.rs
+++ b/src/x11/ffi.rs
@@ -29,6 +29,7 @@ pub type XrmDatabase = *const ();       // TODO: not sure
 pub type XIC = *mut ();
 pub type XID = uint;
 pub type XIM = *mut ();
+pub type Screen = ();
 
 pub static AllocNone: libc::c_int = 0;
 pub static AllocAll: libc::c_int = 1;
@@ -1337,8 +1338,26 @@ pub struct XButtonEvent {
     pub same_screen: Bool,
 }
 
+#[repr(C)]
+pub struct XF86VidModeModeInfo {
+    pub dotclock: libc::c_uint,
+    pub hdisplay: libc::c_ushort,
+    pub hsyncstart: libc::c_ushort,
+    pub hsyncend: libc::c_ushort,
+    pub htotal: libc::c_ushort,
+    pub hskew: libc::c_ushort,
+    pub vdisplay: libc::c_ushort,
+    pub vsyncstart: libc::c_ushort,
+    pub vsyncend: libc::c_ushort,
+    pub vtotal: libc::c_ushort,
+    pub flags: libc::c_uint,
+    privsize: libc::c_int,
+    private: libc::c_long,
+}
+
 #[link(name = "GL")]
 #[link(name = "X11")]
+#[link(name = "Xxf86vm")]
 extern "C" {
     pub fn XCloseDisplay(display: *mut Display);
     pub fn XCheckMaskEvent(display: *mut Display, event_mask: libc::c_long,
@@ -1375,6 +1394,10 @@ extern "C" {
     pub fn XSetWMProtocols(display: *mut Display, w: Window, protocols: *mut Atom,
         count: libc::c_int) -> Status;
     pub fn XStoreName(display: *mut Display, w: Window, window_name: *const libc::c_char);
+    pub fn XScreenCount(display: *mut Display) -> libc::c_int;
+    pub fn XScreenOfDisplay(display: *mut Display, screen_number: libc::c_int) -> *const Screen;
+    pub fn XWidthOfScreen(screen: *const Screen) -> libc::c_int;
+    pub fn XHeightOfScreen(screen: *const Screen) -> libc::c_int;
 
     pub fn XCloseIM(im: XIM) -> Status;
     pub fn XOpenIM(display: *mut Display, db: XrmDatabase, res_name: *mut libc::c_char,
@@ -1408,6 +1431,13 @@ extern "C" {
     pub fn glXSwapBuffers(dpy: *mut Display, drawable: GLXDrawable);
 
     pub fn XkbSetDetectableAutoRepeat(dpy: *mut Display, detectable: bool, supported_rtm: *mut bool) -> bool;
+    
+    pub fn XF86VidModeSwitchToMode(dpy: *mut Display, screen: libc::c_int,
+        modeline: *mut XF86VidModeModeInfo) -> Bool;
+    pub fn XF86VidModeSetViewPort(dpy: *mut Display, screen: libc::c_int,
+        x: libc::c_int, y: libc::c_int) -> Bool;
+    pub fn XF86VidModeGetAllModeLines(dpy: *mut Display, screen: libc::c_int,
+        modecount_return: *mut libc::c_int, modesinfo: *mut *mut *mut XF86VidModeModeInfo) -> Bool;
 }
 
 /*
diff --git a/src/x11/mod.rs b/src/x11/mod.rs
index 1b1e116..0f5f557 100644
--- a/src/x11/mod.rs
+++ b/src/x11/mod.rs
@@ -3,8 +3,11 @@ use libc;
 use std::{mem, ptr};
 use std::sync::atomics::AtomicBool;
 
+pub use self::monitor::{MonitorID, get_available_monitors, get_primary_monitor};
+
 mod events;
 mod ffi;
+mod monitor;
 
 pub struct Window {
     display: *mut ffi::Display,
@@ -14,32 +17,14 @@ pub struct Window {
     context: ffi::GLXContext,
     is_closed: AtomicBool,
     wm_delete_window: ffi::Atom,
-}
-
-pub struct MonitorID(uint);
-
-pub fn get_available_monitors() -> Vec<MonitorID> {
-    unimplemented!()
-}
-
-pub fn get_primary_monitor() -> MonitorID {
-    unimplemented!()
-}
-
-impl MonitorID {
-    pub fn get_name(&self) -> Option<String> {
-        Some("<Unknown>".to_string())
-    }
-
-    pub fn get_dimensions(&self) -> (uint, uint) {
-        unimplemented!()
-    }
+    xf86_desk_mode: *mut ffi::XF86VidModeModeInfo,
+    screen_id: libc::c_int,
+    is_fullscreen: bool,
 }
 
 impl Window {
     pub fn new(builder: WindowBuilder) -> Result<Window, String> {
-        // TODO: temporary
-        let dimensions = builder.dimensions;
+        let dimensions = builder.dimensions.unwrap_or((800, 600));
 
         // calling XOpenDisplay
         let display = unsafe {
@@ -50,7 +35,9 @@ impl Window {
             display
         };
 
-        // TODO: set error handler?
+        let screen_id = unsafe {
+            ffi::XDefaultScreen(display)
+        };
 
         // getting the FBConfig
         let fb_config = unsafe {
@@ -81,6 +68,31 @@ impl Window {
             preferred_fb
         };
 
+        let mut best_mode = -1;
+        let modes = unsafe {
+            let mut mode_num: libc::c_int = mem::uninitialized();
+            let mut modes: *mut *mut ffi::XF86VidModeModeInfo = mem::uninitialized();
+            if ffi::XF86VidModeGetAllModeLines(display, screen_id, &mut mode_num, &mut modes) == 0 {
+                return Err(format!("Could not query the video modes"));
+            }
+
+            for i in range(0, mode_num) {
+                let mode: ffi::XF86VidModeModeInfo = **modes.offset(i as int);
+                if mode.hdisplay == dimensions.val0() as u16 && mode.vdisplay == dimensions.val1() as u16 {
+                    best_mode = i;
+                }
+            };
+            if best_mode == -1 {
+                return Err(format!("Could not find a suitable graphics mode"));
+            }
+
+           modes
+        };
+
+        let xf86_desk_mode = unsafe {
+            *modes.offset(0)
+        };
+
         // getting the visual infos
         let visual_infos = unsafe {
             let vi = ffi::glXGetVisualFromFBConfig(display, fb_config);
@@ -109,18 +121,28 @@ impl Window {
             swa.colormap = cmap;
             swa.event_mask = ffi::ExposureMask | ffi::ResizeRedirectMask |
                 ffi::VisibilityChangeMask | ffi::KeyPressMask | ffi::PointerMotionMask |
-                ffi::KeyPressMask | ffi::KeyReleaseMask | ffi::ButtonPressMask |
+                ffi::KeyReleaseMask | ffi::ButtonPressMask |
                 ffi::ButtonReleaseMask | ffi::KeymapStateMask;
+            swa.border_pixel = 0;
+            swa.override_redirect = 0;
             swa
         };
 
+        let mut window_attributes = ffi::CWBorderPixel | ffi::CWColormap | ffi:: CWEventMask;
+        if builder.monitor.is_some() {
+            window_attributes |= ffi::CWOverrideRedirect;
+            unsafe {
+                ffi::XF86VidModeSwitchToMode(display, screen_id, *modes.offset(best_mode as int));
+                ffi::XF86VidModeSetViewPort(display, screen_id, 0, 0);
+                set_win_attr.override_redirect = 1;
+            }
+        }
+
         // finally creating the window
         let window = unsafe {
-            let dimensions = dimensions.unwrap_or((800, 600));
-
-            let win = ffi::XCreateWindow(display, root, 50, 50, dimensions.val0() as libc::c_uint,
+            let win = ffi::XCreateWindow(display, root, 0, 0, dimensions.val0() as libc::c_uint,
                 dimensions.val1() as libc::c_uint, 0, visual_infos.depth, ffi::InputOutput,
-                visual_infos.visual, ffi::CWColormap | ffi::CWEventMask,
+                visual_infos.visual, window_attributes,
                 &mut set_win_attr);
             win
         };
@@ -148,7 +170,7 @@ impl Window {
                 addr = ffi::glXGetProcAddress(b"glXCreateContextAttribsARB".as_ptr()
                     as *const u8) as *const ();
             }
-            
+
             addr.to_option().map(|addr| {
                 let addr: extern "system" fn(*mut ffi::Display, ffi::GLXFBConfig, ffi::GLXContext,
                     ffi::Bool, *const libc::c_int) -> ffi::GLXContext = mem::transmute(addr);
@@ -202,13 +224,13 @@ impl Window {
             }
 
             attributes.push(0);
- 
+
             let context = if create_context_attribs.is_some() {
                 let create_context_attribs = create_context_attribs.unwrap();
                 create_context_attribs(display, fb_config, ptr::null(), 1,
                     attributes.as_ptr())
             } else {
-                ffi::glXCreateNewContext(display, fb_config, ffi::GLX_RGBA_TYPE, ptr::null(), 1)
+                ffi::glXCreateContext(display, &visual_infos, ptr::null(), 1)
             };
 
             if context.is_null() {
@@ -227,6 +249,9 @@ impl Window {
             context: context,
             is_closed: AtomicBool::new(false),
             wm_delete_window: wm_delete_window,
+            xf86_desk_mode: xf86_desk_mode,
+            screen_id: screen_id,
+            is_fullscreen: builder.monitor.is_some(),
         };
 
         // calling glViewport
@@ -300,9 +325,9 @@ impl Window {
 
     pub fn poll_events(&self) -> Vec<Event> {
         use std::mem;
-        
+
         let mut events = Vec::new();
-        
+
         loop {
             use std::num::Bounded;
 
@@ -362,7 +387,7 @@ impl Window {
 
                         let mut buffer: [u8, ..16] = [mem::uninitialized(), ..16];
                         let raw_ev: *mut ffi::XKeyEvent = event;
-                        let count = ffi::Xutf8LookupString(self.ic, mem::transmute(raw_ev), 
+                        let count = ffi::Xutf8LookupString(self.ic, mem::transmute(raw_ev),
                             mem::transmute(buffer.as_mut_ptr()),
                             buffer.len() as libc::c_int, ptr::mut_null(), ptr::mut_null());
 
@@ -402,7 +427,7 @@ impl Window {
                     };
 
                     match button {
-                        Some(button) => 
+                        Some(button) =>
                             events.push(MouseInput(state, button)),
                         None => ()
                     };
@@ -457,7 +482,14 @@ impl Window {
 
 impl Drop for Window {
     fn drop(&mut self) {
+        unsafe { ffi::glXMakeCurrent(self.display, 0, ptr::null()); }
         unsafe { ffi::glXDestroyContext(self.display, self.context); }
+
+        if self.is_fullscreen {
+            unsafe { ffi::XF86VidModeSwitchToMode(self.display, self.screen_id, self.xf86_desk_mode); }
+            unsafe { ffi::XF86VidModeSetViewPort(self.display, self.screen_id, 0, 0); }
+        }
+
         unsafe { ffi::XDestroyIC(self.ic); }
         unsafe { ffi::XCloseIM(self.im); }
         unsafe { ffi::XDestroyWindow(self.display, self.window); }
diff --git a/src/x11/monitor.rs b/src/x11/monitor.rs
new file mode 100644
index 0000000..f1b861b
--- /dev/null
+++ b/src/x11/monitor.rs
@@ -0,0 +1,55 @@
+use std::{ptr};
+use super::ffi;
+
+pub struct MonitorID(uint);
+
+pub fn get_available_monitors() -> Vec<MonitorID> {
+    let nb_monitors = unsafe {
+        let display = ffi::XOpenDisplay(ptr::null());
+        if display.is_null() {
+            fail!("get_available_monitors failed");
+        }
+        let nb_monitors = ffi::XScreenCount(display);
+        ffi::XCloseDisplay(display);
+        nb_monitors
+    };
+
+    let mut vec = Vec::new();
+    vec.grow_fn(nb_monitors as uint, |i| MonitorID(i));
+    vec
+}
+
+pub fn get_primary_monitor() -> MonitorID {
+    let primary_monitor = unsafe {
+        let display = ffi::XOpenDisplay(ptr::null());
+        if display.is_null() {
+            fail!("get_available_monitors failed");
+        }
+        let primary_monitor = ffi::XDefaultScreen(display);
+        ffi::XCloseDisplay(display);
+        primary_monitor
+    };
+
+    MonitorID(primary_monitor as uint)
+}
+
+impl MonitorID {
+    pub fn get_name(&self) -> Option<String> {
+        let MonitorID(screen_num) = *self;
+        Some(format!("Monitor #{}", screen_num))
+    }
+
+    pub fn get_dimensions(&self) -> (uint, uint) {
+        let dimensions = unsafe {
+            let display = ffi::XOpenDisplay(ptr::null());
+            let MonitorID(screen_num) = *self;
+            let screen = ffi::XScreenOfDisplay(display, screen_num as i32);
+            let width = ffi::XWidthOfScreen(screen);
+            let height = ffi::XHeightOfScreen(screen);
+            (width as uint, height as uint)
+        };
+
+        dimensions
+    }
+}
+